Abstract 20 How to cite the abstract: Berger H., Foissner W., Schaumburg, J. (2000): Diversity of planktonic freshwater ciliates. - The Journal of Eukaryotic Microbiology, Supplement 47: 9A, Abstract 68. Diversity of Planktonic Freshwater Ciliates, HELMUT BERGER*, WILHELM FOISSNER**, and JOCHEN SCHAUMBURG***, *Technisches Buero fuer Oekologie, Radetzkystrasse 10, A–5020 Salzburg, Austria; **Universitaet Salzburg, Institut für Zoologie, Hellbrunnerstrasse 34, A–5020 Salzburg, Austria; and ***Bayerisches Landesamt für Wasserwirtschaft, Postfach 190241, D–80602, Muenchen, Germany. About 170 species of euplanktonic freshwater ciliates have been described worldwide. Considering that about 25 of them have been described by a handful Eurasian workers during the past two decades, it is very likely that a lot of euplanktonic ciliates are still undescribed. However, diversity of plankton ciliates is distinctly lower than that of benthic ciliates, probably because the pelagial provides fewer niches. 119 species (including 6 new ones) in 64 genera have been described in detail in the book cited below. The largest genera are Urotricha, Monodinium and Rimostrombidium. Within the higher taxa, the euplanktonic species are distributed as follows: Gymnostomatea 26.7 %, Prostomatida 23 %, Peritrichia 18.5 %, Oligotrichida 15.6 %, Hymenostomata 4.4 %, Hypotrichia 3.0 %, Colpodea 3.0 %, Heterotrichida 2.2 %, Suctoria 2.2 %, Cyrtophorida 0.7 %, Nassulida 0.7 %. About 20 % of the species have zoochlorellae and/or cleptoplasts, which is a distinct higher proportion than found in benthic species from running waters (only about 5 %!), indicating food as limiting factor in plankton ciliate communities. Supported by the Bayerische Landesamt für Wasserwirtschaft, Munich. FOISSNER, W., BERGER, H. & SCHAUMBURG, J. (1999): Identification and ecology of limnetic plankton ciliates. – Informationsberichte des Bayerischen Landesamtes für Wasserwirtschaft, 3/99: 1-793. Links Homepage www.protozoology.com Publication list of Helmut Berger Publisher Helmut Berger Main publication to this topic Species described and keywords: Actinobolina radians, smalli, vorax, wenrichii, Belonophrya pelagica, Mesodinium acarus, pulex, Askenasia acrostomia, chlorelligera, volvox, Rhabdoaskenasia minima, Liliimorpha viridis, Didinium chlorelligerum, nasutum, Monodinium alveolatum, balbiani balbiani, breviproboscis, rostratum, chlorelligerum, perrieri, Cyclidium viride, Pelagovasicola cinctum, Paradileptus elephantinus, Pelagodileptus, trachelioides, Teuthophrys trisulca, africana, Balantidion pellucidum, Lagynophrya acuminata, Lepidotrachelophyllum lineare, Pelagolacrymaria moserae, Coleps hirtus, viridis, spetai, elongatus, nolandi, Urotricha, apsheronica, pelagica, valida, venatrix, simonsbergeri, castalia, matthesi, tristicha, furcata, pseudofurcata, agailis, farcta, globosa, platystoma, Balanion planctonicum, Longitricha puytoraci, Bursellopsis spumosa, pelagica, nigricans, mobilis, truncata, Pelagothrix, chlorelligera, plancticola, Disematostoma, buetschlii, tetraedricum, Frontonia leucas, Histiobalantium bodamicum, Marituja pelagica, Stokesia vernalis, Peritrichia, Peritrichida, peritrichids, Peritricha, Astylozoon fallax, faurei, Hastatella radians, Opisthonecta henneguyi, Trichodina pediculus, Pelagovorticella mayeri, natans, Vorticella aquadulcis, chlorellata, vernalis, Pseudohaplocaulus infravacuolatus, Epicarchesium pectinatum, Epistylis anastatica, digitalis, procumbens, pygmaeum, Ophrydium eutrophicaum, versatile, naumanni, Spirotrichea, Oligotrichida, Heterotrichida, Hypotrichia, Hypotrichida, Hypotricha, Stichotrichia, stichotrichs, oligotrichs, heterotrichs, Halteria, bifurcata, grandinella, Pelagohalteria cirrifera, viridis, Limnostrombidium pelagicum, viride, Pelagostrombidium fallax, mirabile, armeniensis, lacustris, Rimostrombidium velox, brachykinetum, hyalinum, humile, Oligotrichida, Oligotricha, Oligotrichia, oligotrichids, Codonella cratera, Membranicola tamari, Tintinnidium ephemeridium, fluviatile, pusillum, Tintinnopsis cylindrata, Linostomella vorticella, Stentor, amethystinus, araucanus, Hypotrichidium conicum, Pelagotrichium faurei, Pseudostrombidium planctonticum, Spiretella plancticola, Cyrtophorida, Nassulida, Colpodea, Phascolodon, Obertrumia, Bursaridium pseudobursaria, Colpoda steinii, colpodids, Cyrtolophosis mucicola, Suctoria, suctorids, Mucophrya pelagica, Gajewskajophrya melosirae, Staurophrya elegans, Gymnostomatea, gymnostomatids, Prostomatida, prostomatids, Hymenostomata hymenostomatids, Peritrichia, Peritricha, peritrichs, Alveolata, Protozoa, Protista, protist, ciliates, Wimpertierchen, Ziliaten Ciliates, Ciliaten Ciliophora, guide, identification, key, Limnologie, limnology, plankton,zooplankton, Austria, Bavaria, Germany, Europe, Salzburg, Upper Austria, Mondsee, lake, pond, running water, See, Tümpel, Bach, Fluss, Fluß, Gewässer, plancton, planktonic, euplanktonic, method, cyst, resting cyst, nutrion, movement, review, revision, monograph, literature, parasite, parasitism, sampling, counting, species concept, adaptation, abundance, biomass, productivity, community, diversity, biodiversity, Diversität, ecology, Ökologie, nomenclature, Nomenklatur, Systematik, systematics, identification, Bestimmung, Literatur, literature, bibliography, Bibliographie, biogeography, Biogeographie, geography, Geographie Top Dr Helmut BERGER Consulting Engineering Office for Ecology - Technisches Büro für Ökologie Radetzkystrasse 10, 5020 Salzburg, Austria, Europe Phone +43-(0)662-432538; Fax +43-(0)662-443139; email office@protozoology.com; http://www.protozoology.com